     [:p.info-2e4f9
       "ClojureScript provides four collection types: lists, vectors, sets, and "
       "maps. "
-      "These data types have unique strengths and are used heavily in programs."]
+      "Each of these data types has unique strengths and are used heavily."]
     [:p.info-2e4f9
       "All collections are immutable and persistent, which means they preserve "
-      "the previous versions of themselves when they are modified. "
+      "the previous version(s) of themselves when they are modified. "
       "Creating a \"changed\" version of any collection is an efficient "
       "operation."]
     [:p.info-2e4f9

    [:table.exmpl-tbl-42d9f
      [:thead
        [:tr
          [:th.hdr-5bd04 {:style "width:25%"} "Collection"]
          [:th.hdr-5bd04 "Literal Form"]]]
      [:tbody
        [:tr

      "small function definition and is often used to pass closures from one "
      "scope to another."]
    [:p.info-2e4f9
      [:code "#()"] " forms cannot be nested."]]
    [:table.exmpl-tbl-42d9f
      [:thead
        [:tr
